It's not a secret anymore!
The moose likes Beginning Java and the fly likes Collections heirarchy Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "Collections heirarchy" Watch "Collections heirarchy" New topic

Collections heirarchy

Glenny Dsilva
Ranch Hand

Joined: May 09, 2005
Posts: 42
I am creating a program to store Categories and SubCategories

like main category is having subcategories and each subcategory can have subcategories like a heirarchy.

Main Category1
| |
Sub Category1 Sub Category 2
Sub Category 1a

I want to store this heirarchy structure in a collection can anybody explain which type of collection to use and how will i retrieve the collection.

dinesh Venkatesan
Ranch Hand

Joined: Oct 12, 2006
Posts: 134

With my understanding about your problem statement i suggest you can use HashMaps where a Key,Value pair could be <MainCategory,SubCategory> Where the SubCategory is of type HashMap. That means you will result in something like this.


like this. Still not clear. Take a look at this snippet.

I agree. Here's the link:
subject: Collections heirarchy
It's not a secret anymore!